removed internal err declaration
removed internal err declaration

segmentio/mysql,methane/mysql,springning/mysql,Frca/mysql,segmentio/mysql,henrylee2cn/mysql,VividCortex/mysql,cxflag203/mysql,rlowe/mysql,aperera/mysql,LightKool/mysql-go,helight/helight_code,helight/helight_code,eklitzke/mysql,LightKool/mysql-go,helight/helight_code,yyljlyy/mysql,bookerzzz/mysql,Vorstack/mysql,helight/helight_code,wfxiang08/mysql,rafaeljusto/mysql,methane/mysql,hyperworks/mysql,nanata1115/mysql,helight/helight_code,chinanjjohn2012/mysql,helight/helight_code,siriele/mysql,yonglehou/mysql,tmulchay/mysql,roth1002/mysql,joshuaprunier/mysql,muthusubbu459/mysql,sunjian1/mysql,Go-SQL-Driver/MySQL,Freeaqingme/golang-sql-driver-mysql,beego/mysql,helight/helight_code,go-sql-driver/mysql,helight/helight_code,jockchou/mysql,eXcomm/gomysql,cw2018/mysql,bookerzzz/mysql,helight/helight_code,hebihui/mysql,dalinaum/go-mysql-driver,zhgo/mysql,VividCortex/mysql,netroby/mysql